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Business Description: Heating, Air Conditioning, and Custom Sheet Metal Fabrication. NO JOB TOO BIG or SMALL! Air-O Service isyour multi-service heating and cooling specialist serving the northstate since 1976. From commercial to residential, we have you covered. We install service and maintain air-conditioners, heat pumps, furnaces, water heater, geo-thermal and hybrid heat systems. We also install air cleaning, filtering, exchangers and humidifiers. Need a new up to date thermostat for your home or business? We can do that too!